BS ISO 29783-3:2016 pdf download.Prosthetics and orthotics — Vocabulary — Part 3: Pathological gait (excluding prosthetic gait)
1 Scope
This part of ISO 29783 specifies a method of describing abnormal gait patterns resulting from pathology (excluding prosthetic gait) by identifying the deviations from the normal pattern of gait during each sub-phase of the gait cycle. The description of the deviations includes references to abnormal foot
contact and abnormalities of joint motion.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 29783-1, Prosthetics and orthotics — Vocabulary — Part 1: Normal gait
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 29783-1 apply.
4 Pathological gait
4.1 General
Structural damage to the musculoskeletal system, and/or muscle weakness, and/or abnormal neuromuscular control can lead to an abnormal gait pattern. The abnormal motions of the lumbar spine, pelvis and lower limb segments can be a result of the pathology and/or be compensatory.
NOTE Abnormal motions of the remainder of the trunk, head, neck and upper limbs during gait are not described in this part of ISO 29783.
4.2 Method of description
4.2.1 Gait deviations
Abnormal gait shall be described by stating the deviations from the normal gait pattern, for each of the undernoted sub-phases of the gait cycle:
— initial contact;
— loading response;
— mid-stance;
— terminal stance;
— pre-swing;
— initial swing;
— mid-swing;
— terminal swing.
The normal gait pattern specified in ISO 29783-1 is the widely accepted pattern for the adult population.
Persons applying this part of ISO 29783 shall decide what magnitude of deviation from the normal is significant and, therefore, requiring to be specified.
4.2.2 Abnormal foot contact
The area of contact of the foot can be abnormal for parts or all of the stance phase of the gait cycle.
Abnormal areas of foot contact can be
— lateral side,
— medial side,
— forefoot,
— midfoot,
— hindfoot,
— total plantar surface,
— dorsum, and
— combinations of these.
Specify the abnormal area of foot contact for each affected sub-phase of the stance phase.
4.2.3 Abnormalities of joint motion
4.2.3.1 Abnormal angular motion
Pathological conditions can result in abnormal angular motions of the joints. Abnormal angular motion of a joint can be described by specifying the joint angle at the end of each sub-phase of the gait cycle.
— An abnormal joint angle, which is in a normal plane and normal direction of motion, can be either increased or decreased.
— An abnormal joint angle, which is in a normal plane of motion, can be in the opposite direction to normal.
— An abnormal joint angle can be in an abnormal plane of motion.
Specify for each sub-phase of the gait cycle any abnormal joint angles in the relevant planes of motion.
If the angle of any joint is fixed, this shall be specified at initial contact only.
EXAMPLE 1 At initial contact in the sagittal plane, the normal knee joint angle is between 0° and 5° of flexion.
Possible abnormal joint angles are the following:
— increased knee joint flexion (i.e. >5°), e.g. knee flexion contracture;
— knee joint hyperextension, e.g. generalized ligament laxity;
— fixed knee joint flexion (e.g.15°), e.g. severe osteoarthritis.
BS ISO 29783-3:2016 pdf download
